Light Fixture Solid-State Source Outlet Lens 90% Efficiency
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Solution Overview
Problem
Existing light fixtures for generating visible light beams at long distances, such as those used in architectural lighting, face challenges with high energy consumption due to the use of high-power lamps like XENON gas arc lamps, which are inefficient and costly.
Innovation Solution
A light fixture utilizing a source assembly with solid-state light sources, an outlet optical assembly with a high-efficiency outlet lens, and a processing optical assembly to maximize optical efficiency, achieving a light beam that is visible at great distances with significantly reduced energy consumption, below 0.30 kW.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If high-power XENON gas arc lamps are used to generate visible light beams at long distances, then the light beam intensity and visibility are improved, but the energy consumption increases significantly (5000-7000 watts)
Solution Approach 1:
The patent changes the fundamental parameters of the light source from high-power gas arc lamps (5000-7000W) to solid-state LED sources, operating at much lower power (below 0.30 kW). This parameter change in the light source type and power level, combined with optimized optical efficiency, resolves the contradiction by achieving adequate visibility with dramatically reduced energy consumption
Solution Approach 2:
The patent substitutes the traditional mechanical/electrical high-power lamp system with a solid-state LED system. This substitution replaces the high-energy-consuming gas arc lamp mechanism with a more efficient solid-state light emission mechanism, achieving the same or better light beam visibility function with minimal energy input
2Illumination intensity
If high-power lamps are used to ensure light beam visibility at great distance, then the visibility is improved, but the cost increases due to high energy consumption
Solution Approach 1:
The patent changes the power consumption parameter from kilowatt-range (5000-7000W) to sub-kilowatt range (below 0.30 kW) while maintaining visibility performance through optimized optical design, directly reducing operating costs
Solution Approach 2:
The patent employs solid-state LED sources which are inherently more cost-effective and have longer operational lifetimes compared to high-power gas arc lamps, reducing both initial investment and long-term operating costs while maintaining the required visibility function
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables the generation of a highly intense and luminous light beam with minimal energy loss, ensuring visibility from far distances while reducing energy consumption and costs, with an optical efficiency of at least 90%.
Implementation Method 1
a source assembly (10) comprising at least one solid state light source and configured to generate a light beam
Implementation Method 2
the outlet lens being sized so that the optical efficiency of the light fixture is at least equal to 90%
Data Source
AI summary
A light fixture includes a source assembly comprising at least one solid state light source and configured to generate a light beam in an emission direction; and at least one outlet optical assembly arranged so as to intercept the light beam emitted by the source assembly. The outlet optical assembly comprises at least one outlet lens, which is arranged so as to be the last lens that intercepts the light beam, at least partially. The outlet lens is sized so that the optical efficiency of the light fixture is at least equal to 90%; wherein optical efficiency is the ratio between the etendue of the beam being emitted from the outlet lens and the etendue of the source assembly in accordance with the following relation:OPTICAL EFFICIENCY=EtendueOUT/EtendueSOURCE·100.